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Blind Flanges

Inconel 625 Blind Flanges, ASME SA182 Duplex 2205 Blind Flanges, UNS S30400 Blind Flanges, UNS N06625 Blind Flanges, 2507 Super Duplex Blind Flanges, UNS N08904 Blind Flanges.

blind-flanges-manufacturer-image

About Blind Flanges

Blind flanges have several uses in energy, petrochemical, chemical processing, water treatment, and other sectors. They are frequently employed in piping systems to allow for inspections, repairs, and alterations by isolating specific pipeline sections. When the future extension of the system is expected, blind flanges are used so that new pipes can be connected with minimal interference to the current system.

The blind flange is more popular than other options due to its many advantages. Blind flanges guarantee that the system is leak-free by establishing a tight seal. They come in handy when it’s necessary to cut down the pipeline’s flow temporarily or permanently. The pipeline can be inspected or cleaned quickly and easily, thanks to blind flanges.

Blind flanges can only serve their intended purpose if they are installed correctly. Align the flange with the pipe end and bolt it securely using the recommended torque values. Using suitable gaskets is essential for a secure and leak-free seal. Blind flanges need to be inspected and maintained frequently to address any signs of damage, corrosion, or wear before they jeopardize the flange’s performance.

Blind flanges are an efficient and dependable method of sealing pipe ends in various industrial and commercial applications. They may be used with various piping systems because of their adaptability, durability, and conformity to industry standards. Engineers and professionals can make better selections when choosing flange components by learning about the characteristics, uses, and advantages of blind flanges.

WRN 2.4856 Blind Flanges Manufacturer, UNS N06625 Blind Flanges Exporter, 304 Stainless Steel Blind Flanges Stockist, 2507 Super Duplex Blind Flanges Supplier.

Specification of Blind Flanges

StandardsANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, GOST Flange, ASME/ANSI B16.5/16.36/16.47A/16.47B, MSS S44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092
Size Chart1/2" (15 NB) to 48" (1200NB) DN10~DN5000
Pressure Calculation in DIN6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64 Blind Flange
Pressure Rating ANSIClass 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS Blind Flange
UNI6Bar 10Bar 16Bar 25Bar 40Bar Blind Flange
JIS5K, 10 K, 16 K 20 K, 30 K, 40 K, 63 K Blind Flange
CoatingOil Black Paint, Anti-rust Paint, Zinc Plated, Yellow Transparent, Cold and Hot Dip Galvanized Blind Flange
EN6Bar 10Bar 16Bar 25Bar 40Bar Blind Flange
Most common types of Blind FlangeForged / Threaded / Screwed / Plate
Connect Type/ Flange Face TypeRaised Face (RF), Ring Type Joint (RTJ), Flat Face (FF), Large Male-Female (LMF), Lap-Joint Face (LJF), Small Male-Female (SMF), Small Tongue, Large Tongue & Groove, Groove

Dimensions Standard Of Blind Flanges

Class 150 Blind Flange Dimensions

Normal Diam.O.D. FlangeThk. Of Flange MinDiameter of Raised FaceDiam.
of Bolt
Circle
Diam.
of Bolt
Holes
Number
of Bolts
Diam. of
Bolts
(inch)
Approx. Weight
inchdnOCGBCBHBNBDKGLB
1/2″1589.0011.2035.1060.5015.8041/2″0.51.1
3/4″2098.5012.7042.9069.9015.8041/2″0.81.8
1″25108.0014.2050.8079.3015.8041/2″0.92
1-1/4″32117.5015.7063.5088.9015.8041/2″1.32.9
1-1/2″40127.0017.5073.2098.6015.8041/2″1.63.5
2″50152.5019.1091.90120.7019.1045/8″2.65.7
2-1/2″65178.0022.40104.60139.7019.1045/8″4.19
3″80190.5023.90127.00152.4019.1045/8″5..111.2
3-1/2″90216.0023.90139.70177.8019.1085/8″6.514.3
4″100228.5023.90157.20190.5019.1085/8″7.516.5
5″125254.0023.90185.70215.9022.4083/4″9.220.3
6″150279.5025.40215.90241.3022.4083/4″11.826
8″200343.0028.40269.70298.5022.4083/4″20.445
10″250406.5030.20323.90362.0025.40127/8″3168
12″300482.5031.80381.00431.8025.40127/8″47103
14″350533.5035.10412.80476.3028.50121″60132
16″400597.0036.60469.90539.8028.50161″81178
18″450635.0039.60533.40577.9031.80161 1/8″93205
20″500698.5042.90584.20635.0031.80201 1/8″127280
24″600813.0047.80692.20749.3035.10201 1/4″190419

Class 300 Blind Flange Dimensions

Normal Diam.O.D. FlangeThk. Of Flange MinDiameter of Raised FaceDiam.
of Bolt
Circle
Diam.
of Bolt
Holes
Number
of Bolts
Diam. of
Bolts
(inch)
Approx. Weight
inchdnOCGBCBHBNBDKG/PCSLB/PCS
1/2″1595.514.235.166.515.741/2″0.81.8
3/4″20117. 515.742.982.619.145/8″1.22.6
1″25124. 017.550.888.919.145/8″1.53.3
1-1/4″32133. 519.163.598.619.145/8″24.4
1-1/2″40155. 520.673.2114.322.445/8″2.96.4
2″50165. 022.491.912719.185/8″3.57.7
2-1/2″65190. 525.4104.6149.422.483/4″5.311.7
3″80209. 528.4127168.122.483/4″7.215.9
3-1/2″90228. 530.2139.7184.222.483/4″9.220.3
4″100254. 031.8157.2200.222.483/4″12.226.8
5″125279. 535.1185.723522.483/4″1635.2
6″150317. 536.6215.9269.722.4123/4″2248.4
8″200381. 041.1269.7330.225.4127/8″3679.5
10″250444. 547.8323.9387.428.4161″55121
12″300520. 550.8381450.931.8161 1/8″82.5182
14″350584. 053.8412.8514..431.8201 1/8″108238
16″400647. 557.2469.9571.535.1201 1/4″139306
18″450711. 060.5533.4628.735.1241 1/4″178392
20″500774. 563.5584.2685.835.1241 1/4″228503
24″600914. 569.9692.2812.841.1241 1/2″350772

Class 600 Blind Flange Dimensions

Normal Diam.O.D. FlangeThk. Of Flange MinDiameter of Raised FaceDiam.
of Bolt
Circle
Diam.
of Bolt
Holes
Number
of Bolts
Diam. of
Bolts
(inch)
Approx. Weight
inchdnOCGBCBHBNBDKG/PCSLB/PCS
1/2″1595.514.235.166.515.741/2″0.81.8
3/4″20117. 515.742.982.619.145/8″1.43.1
1″25124. 017.550.888.919.145/8″1.73.7
1-1/4″32133. 520.663.598.619.145/8″2.45.3
1-1/2″40155. 522.473.2114.322.443/4″3.47.5
2″50165. 025.491.912719.185/8″4.49.7
2-1/2″65190. 528.4104.6149.422.483/4″6.815
3″80209. 531.8127168.122.483/4″8.919.7
3-1/2″90228. 535.1139.7184.225.487/8″12.728
4″100273. 038.1157.2215.925.487/8″18.641
5″125330. 044.5185.7266.728.481″30.868
6″150355. 547.8215.9292.128.4121″3883.6
8″200419. 055.6269.7349.331.8121 1/8″62.2137
10″250508. 063.5323.9431.835.1161 1/4″102225
12″300559. 066.538148935.1201 1/4″132291
14″350603. 569.9412.8527.138.1201 3/8″158348
16″400686. 076.2469.9603.341.1201 1/2″225496
18″450743. 082.6533.4654.144.5201 5/8″285628
20″500813. 088.9584.2723.944.5241 5/8″365805
24″600940. 0101.6692.2838.250.8241 7/8″5321170

Class 1500 Blind Flanges Dimensions

Normal Diam.O.D. FlangeThk. Of Flange MinDiam.
of
Hub
Diam.
of Bolt
Circle
Diam.
of Bolt
Holes
Number
of Bolts
Diam. of
Bolts
(inch)
Approx. Weight
inchdnOCXBCBHBNBDKG/PCSLB/PCS
1/2″15120.722.438.182.622.443/4″1.94.2
3/4″2013025.444.588.922.443/4″2.76
1″25149.428.452.3101.625.447/8″3.78.1
1-1/4″32158.828.463.5111.325.447/8″4.39.5
1-1/2″40177.831.869.912428.441″5.913
2″50215.938.1104.6165.125.487/8″11.324.9
2-1/2″65244.341.1124190.528.481″1635.2
3″80266.747.8133.4190.525.487/8″19.543
4″100311.253.8162.123531.881 1/8″3372.8
5″125374.773.2196.9279.435.181 1/4″60132
6″150393.782.6228.6317.531.8121 1/8″75165
8″200482.691.9292.1393.738.1121 3/8″125275
10″250584.2108368.3469.938.1161 3/8″215474
12″300673.1124450.9533.438.1201 3/8″316697
14″350749.3133.4495.3558.841.1201 1/2″  
16″400825.5146.1552.561644.5201 5/8″  
18″450914.4162.1596.9685.850.8201 7/8″  
20″500984.3177.8641.4749.353.8202″  
24″6001168.4203.2762901.766.5202 1/2″  

Class 2500 Blind Flanges Dimensions

Normal Diam.O.D. FlangeThk. Of Flange MinDiam.
of Bolt
Circle
Diam.
of Bolt
Holes
Number
of Bolts
Diam. of
Bolts
(inch)
Approx. Weight
inchdnOCBCBHBNBDKGLB
1/2″15133.430.288.922.443/4″37
3/4″20139.731.895.322.443/4″4.510
1″25158.835.110825.447/8″512
1-1/4″32184.238.113028.441″818
1-1/2″40203.244.5146.131.841 1/8″1125
2″5023550.8171.528.481″1738
2-1/2″65266.757.2196.931.881 1/8″2555
3″80304.866.5228.635.181 1/4″3986
4″100355.676.2273.141.181 1/2″60133
5″125419.191.9323.947.881 3/4″101223
6″150482.6108368.353.882″156345
8″200552.5127438.253.8122″242533
10″250673.1165.1539.866.5122 1/2″4651023
12″300762184.2619.373.2122 3/4″6651463

Size Of Blind Flanges

Size150 #300 #600 #900 #1500 #2500 #
WNSOBLDWNSOBLDWNSOBLDWNSOBLDWNSOBLDWNSOBLDWN
1/2"211211222SEE 1500 # WEIGHTS544777
3/4"222333433SEE 1500 # WEIGHTS656888
1"322433444SEE 1500 # WEIGHTS988121111
1 1/2"433766878SEE 1500 # WEIGHTS131213252223
2"65597812910SEE 1500 # WEIGHTS252525423739
2 1/2"877121012181315SEE 1500 # WEIGHTS363635525556
3"1089151316231620312629484848948386
4"151317252227423741535354737373145125130
5"191520322835686368868387130130140245210225
6"241926423950818086110110115165165160380325345
8"393045675881120115140175170200275260300580485530
10"524370918112419017023026024529045543551010759301025
12"8064110140115185225200295325325415690580690152511001300
14"11090140180165250280230355400400520940NA975NANANA
16"140981802501902953903304954954256001250NA1300NANANA
18"1501302203202503954754006306806008501625NA1750NANANA
20"18016528540031550559051081083073010752050NA2225NANANA
22"2251853554653706407205901000NANANANANANANANANA
24"26022043058047579083073012501500140020253325NA3625NANANA

Weight Chart Of Blind Flanges

DN In inchesDimension125 LBS
150 LBS
300 LBS400 LBS600 LBS900 LBS1500 LBS2500 LBS
inchmm inchmm inchmm inchmm inchmm inchmm inchmm
1/2A3 1/288.93 3/495.23 3/495.23 3/495.24 3/41214 3/41215 1/4133.4
b7/1611.19/1614.39/1614.39/1614.37/822.27/822.21 3/1630.2
D21 3/834.91 3/834.91 3/834.91 3/834.91 3/834.91 3/834.91 3/834.9
D12 3/860.32 5/866.72 5/866.72 5/866.73 1/482.63 1/482.63 1/288.9
n44444444444-444
d5/815.95/815.95/815.95/815.97/822.27/822.27/822.2
3/4A3 7/898.44 5/8117.54 5/8117.54 5/8117.55 1/81305 1/81305 1/2139.7
b1/212.75/815.95/815.95/815.9125.4125.41 1/431.8
D21 11/1642.91 11/1642.91 11/1642.91 11/1642.91 11/1642.91 11/1642.91 11/1642.9
D12 3/469.83 1/482.53 1/482.53 1/482.53 1/288.93 1/288.93 3/495.2
n44444444444-444
d5/815.93/4193/4193/4197/822.27/822.27/822.2
1A4 1/41084 7/8123.84 7/8123.84 7/8123.85 7/8149.25 7/8149.26 1/4159
b9/1614.311/1617.511/1617.511/1617.51 1/828.61 1/828.61 3/834.9
D2250.8250.8250.8250.8250.8250.8250.8
D13 1/879.43 1/288.93 1/288.93 1/288.9410241024 1/4108
n44444444444444
d5/815.93/4193/4193/419125.4125.4125.4
1 1/4A4 5/8117.55 1/4133.45 1/4133.45 1/4133.46 1/41596 1/41597 1/4184.2
b5/815.93/41913/1620.613/1620.61 1/828.61 1/828.61 1/238.1
D22 1/263.52 1/263.52 1/263.52 1/263.52 1/263.52 1/263.52 1/263.5
D13 1/288.93 7/898.43 7/898.43 7/898.44 3/81114 3/81115 1/8130
n44444444444444
d5/815.93/4193/4193/419125.4125.41 1/828.6
1 1/2A51276 1/8155.66 1/8155.66 1/8155.67177.87177.88203
b11/1617.513/1620.67/822.27/822.21 1/431.81 1/431.81 3/444.5
D22 7/873 982 7/8732 7/8732 7/8732 7/8732 7/8732 7/873
D13 7/844 1/21144 1/21144 1/21144 7/81244 7/81245 3/4146
n444
44444444444
d5/8. 15.97/822.27/822.27/822.21 1/828.61 1/828.61 1/431.8
2A6152.46 1/2165.16 1/2165.16 1/2165.18 1/2215.98 1/2215.99 1/4234.9
b3/4197/822.2125.4125.41 1/238.11 1/238.1250.8
D23 5/892.13 5/892.13 5/892.13 5/892.13 5/892.13 5/892.13 5/892.1
D14 3/41215127512751276 1/2165.16 1/2165.16 3/4171
n44888888888888
d3/4193/4193/4193/419125.4125.41 1/828.6
2 1/2A7177.87 1/2190.57 1/2190.57 1/2190.59 5/82449 5/824410 1/2266.7
b7/822.2125.41 1/828.61 1/828.61 5/841.31 5/841.32 1/457.2
D24 1/8104.84 1/8104.84 1/8104.84 1/8104.84 1/81054 1/81054 1/8105
D15 1/2139.75 7/8149.25 7/8149.25 7/8149.27 1/2190.57 1/2190.57 3/4197
n44888888888888

Pressure Rating Of Blind Flanges

Pressure-Temperature Ratings for ASTM Group 2-1.1 Materials
Working pressure by Classes, BAR

Temp
-29 °C
15030040060090015002500
3819.651.168.1102.1153.2255.3425.5
5019.250.166.8100.2150.4250.6417.7
10017.746.662.193.2139.8233388.3
15015.845.160.190.2135.2225.4375.6
20013.843.858.487.6131.4219365
25012.141.955.983.9125.8209.7349.5
30010.239.853.179.6119.5199.1331.8
3259.338.751.677.4116.1193.6322.6
3508.437.650.175.1112.7187.8313
3757.436.448.572.7109.1181.8303.1
4006.534.746.369.4104.2173.6289.3
4255.528.838.457.586.3143.8239.7
4504.62330.74669115191.7
4753.717.423.234.952.387.2145.3
5002.811.815.723.535.358.897.9
5381.45.97.911.817.729.549.2
Temp
°C
15030040060090015002500

Pressure-Temperature Ratings for ASTM Group 2-2.3 Materials
Working pressure by Classes, BAR

Temp
-29 °C
15030040060090015002500
3815.941.455.282.7124.1206.8344.7
5015.34053.480120.1200.1333.5
10013.334.846.469.6104.4173.9289.9
1501231.441.962.894.2157261.6
20011.229.238.958.387.5145.8243
25010.527.536.654.982.4137.3228.9
3001026.134.852.178.2130.3217.2
3259.325.5345176.4127.4212.3
3508.425.133.450.175.2125.4208.9
3757.424.83349.574.3123.8206.3
4006.524.332.448.672.9121.5202.5
4255.523.931.847.771.6119.3198.8
4504.623.431.246.870.2117.1195.1
Temp
°C
15030040060090015002500

Price Of Blind Flanges

Stainless Steel FlangesUSD $2.05 - $10.06 / Piece (FOB Price) on request
High Nickel Alloys FlangesUSD $8.10 - $20.20 / Piece (FOB Price) on request
Duplex & Super Duplex FlangeUSD $10.20 - $35.50 / Piece (FOB Price) on request
Cupro Nickel FlangesUSD $5.19 - $10.48 / Piece (FOB Price) on request
Carbon Steel FlangesUSD $2.08 - $7.10 / Piece (FOB Price) on request

Application Of Blind Flanges

We make sure that our every product is made of high quality raw material. We thoroughly test each and every product before dispatching it to our customers.

Testing Of Blind Flanges

We known for its accurate and perfect dimensions. We thoroughly test all our products before shipping them to the customers. We carry out destructive as well as non-destructive tests on all our products.

Packing Of Blind Flanges

We uses the most safest and the most effective ways of packaging for all types of deliveries. We pack our goods in various ways such as: